A strong electric RV dump valve gives you switch-operated waste control while matching your tank outlet and available installation space. The Valterra E1003NEVP is the strongest all-around fit here, with a 3-inch outlet, pre-wiring, an open-valve warning light, and a stated 3-year warranty. This selection also includes a 1.5-inch Valterra valve, a complete LaSalle Bristol 3-inch motorized valve, a separate motorizing kit, and a 3-inch hub-to-hub Valterra option.
One product, the Thetford Electric Valve C200, is a toilet flush-valve replacement rather than a conventional tank termination valve, so it serves a different repair. Before choosing, confirm whether you need a complete valve or a motor for an existing valve, and verify that its connection type and size fit your RV.
The Valterra E1003NEVP is the best overall choice because it is a 3-inch electric waste valve with a 2.5-amp draw, pre-wiring, a valve-open warning light, and a stated 3-year warranty. Its water-resistant, high-torque motor is described as TEI certified to 6,000 cycles. Choose it when a 3-inch connection matches your RV and you want a packaged electric valve system; check the existing plumbing and mounting arrangement before ordering.
Our Top Picks
Best OverallIts 3-inch outlet suits common tank termination applications, and the package lists pre-wiring, an open-valve warning light, 2.5-amp draw, and a 3-year warranty.
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Best 1.5-Inch FitThis 1.5-inch electric valve includes pre-wired harnesses, a manual override, and an indicator, making it the clearest specified choice for a matching connection.
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Complete Bristol ValveIt includes a 3-inch termination valve, bracket, hardware, motor, wire, and switch, plus a single-pin manual bypass for power or electrical failure.
View on Amazon- 3-Inch Hub Fit Valterra E40B-8
Compare These Electric Dump Valve Options
| # | Product | Weight | Inlet Connection Size | Outlet Connection Size | Buy |
|---|---|---|---|---|---|
| 1 | 1. Valterra E1003NEVPBest Overall | 4 lb | — | 3 in | View on Amazon |
| 2 | 2. Valterra E1013NEVPBest 1.5-Inch Fit | 5.5 lb | 1.5 in | 1.5 in | View on Amazon |
| 3 | 3. LaSalle Bristol 66N4MDVAMComplete Bristol Valve | 4.19 lb | — | — | View on Amazon |
| 4 |  4. Valterra E40B-83-Inch Hub Fit | — | 3 in | 3 in | View on Amazon |
| 5 |  5. LaSalle Bristol 66NMDVAMMotorizing kit for existing valves | 8 lb | — | — | View on Amazon |
| 6 |  6. Thetford Electric Valve C200Thetford toilet replacement valve | 0.13 kg | 25.4 millimeters | 25.4 millimeters | View on Amazon |
Detailed Reviews: Best Electric Dump Valves For RV
#1 · Best Overall
1. Valterra E1003NEVP
- Weight: 4 lb
- Outlet Connection Size: 3 in
Best for: Low-draw 3-inch tank control.
Why it ranks #1: Its 3-inch outlet suits common tank termination applications, and the package lists pre-wiring, an open-valve warning light, 2.5-amp draw, and a 3-year warranty.
A 2.5-amp draw pairs with a high-torque, water-resistant motor, letting this Valterra valve open from a switch without a high stated power demand. Its 3-inch outlet connection targets RV waste plumbing of that size, while the warning light helps show when the valve is open.
The pre-wired connection and convenient switch location support a simpler conversion and keep operation at the switch rather than at the valve. A valve-open warning light provides a visible status cue during tank draining. The motor is TEI certified to 6,000 cycles, and the built-in 5-amp circuit breaker can be reset, supporting continued use after a circuit interruption. Its 3-inch outlet connection is the key plumbing dimension to match before installation.
- 2.5-amp low-power draw
- High-torque, water-resistant electric motor
- Valve-open warning light
- Resettable built-in 5-amp circuit breaker
- The 3-inch outlet connection limits it to plumbing that accepts that size.
Skip it if you need a 1.5-inch electric valve; the Valterra E1013NEVP has 1.5-inch inlet and outlet connections.
Choose this Valterra for an RV owner seeking switch-operated control, a warning light, and a resettable breaker on a 3-inch outlet. Its specified connection size is the essential fit boundary for the plumbing.
Full product details
| Brand | Valterra |
|---|---|
| Item Dimensions | 16 x 12 x 8 inches |
| Item Weight | 4 pounds |
| Dimensions | 16 x 12 x 8 inches |
| Manufacturer | Valterra |
| Part Number | E1003NEVP |
| Model Number | E1003NEVP |
| Outlet Connection Size | 3 inches |
| Size | 1 cubic inch |
Listed on Amazon as: Valterra – E1003NEVP – E-VALVE ELECTRIC 3' BOXED
View on Amazon#2 · Best 1.5-Inch Fit
2. Valterra E1013NEVP
- Weight: 5.5 lb
- Inlet Connection Size: 1.5 in
- Outlet Connection Size: 1.5 in
Best for: Compact 1.5-inch switch control.
Why it ranks #2: This 1.5-inch electric valve includes pre-wired harnesses, a manual override, and an indicator, making it the clearest specified choice for a matching connection.
A 12V switch opens this Valterra waste valve without requiring the operator to kneel by the plumbing or contact odors. Its 1.5-inch inlet and outlet connections suit smaller-diameter plumbing, and the pre-wired harness aims to simplify installation for RV and trailer owners.
The pre-wired valve and switch harness, along with included installation components, can reduce the wiring work needed to add electric operation. A manual override offers a way to operate the valve manually, while the breaker reset switch adds a reset point to the setup. At 12 x 12 x 5 inches, the listed dimensions help assess placement; the 1.5-inch inlet and outlet sizes remain the key plumbing match.
- 12V switch operation
- 1.5-inch inlet and outlet connections
- Pre-wired valve and switch harness
- Manual override included
- Its 1.5-inch connections do not suit 3-inch waste plumbing.
Skip it if you have a 3-inch outlet to motorize; the LaSalle Bristol 66N4MDVAM includes a 3-inch termination valve.
This is a practical match for RV owners wanting switch-controlled draining on 1.5-inch plumbing, with a manual override available. It is not the right connection size for a 3-inch waste-valve installation.
Full product details
| Brand | Valterra |
|---|---|
| Inlet Connection Size | 1.5 inches |
| Item Dimensions | 12 x 12 x 5 inches |
| Item Weight | 5.5 pounds |
| Dimensions | 12 x 12 x 5 inches |
| Manufacturer | Valterra |
| Part Number | E1013NEVP |
| Model Number | E1013NEVP |
| Outlet Connection Size | 1.5 inches |
| Size | Miniature |
| Thread Size | 1.5 inches |
Listed on Amazon as: Valterra E1013NEVP E-valve Electric 3/1 1/2 Bx
View on Amazon#3 · Complete Bristol Valve
3. LaSalle Bristol 66N4MDVAM
- Weight: 4.19 lb
Best for: Complete 3-inch motorized valve.
Why it ranks #3: It includes a 3-inch termination valve, bracket, hardware, motor, wire, and switch, plus a single-pin manual bypass for power or electrical failure.
This LaSalle Bristol package includes a 3-inch termination valve as well as its motorizing kit, giving buyers a switch-operated valve assembly rather than a motor-only kit. Its compact format supports installation in limited-space environments, and the single-pin bypass enables manual operation if RV power fails.
The included 3-inch Bristol termination valve, bracket, hardware, motor, wire, and switch form a package for replacing or adding a motorized termination assembly. The modular design accepts either 1.5-inch or 3-inch valves, supporting use with gray- or black-water systems when paired with the appropriate valve. Compact construction can help where installation room is limited. If the RV battery or electrical system fails, the single-pin bypass provides manual valve operation.
- Includes a 3-inch termination valve
- Motor, wire, switch, bracket, and hardware included
- Modular design accepts 1.5-inch or 3-inch valves
- Single-pin manual bypass
- Manual operation during power failure requires engaging the single-pin bypass.
Skip it if you already have a compatible termination valve and need only a motorizing kit; the LaSalle Bristol 66NMDVAM is the kit-only option.
Pick this package if you need a 3-inch motorized termination valve with switch operation and a manual bypass. The modular design accommodates 1.5- or 3-inch valves, but this package includes a 3-inch valve.
Full product details
| Brand | LaSalle Bristol |
|---|---|
| Item Weight | 4.19 pounds |
| Item model number | 66N4MDVAM |
| Manufacturer | LaSalle Bristol |
| Part Number | 66N4MDVAM |
| Model | 66N4MDVAM |
| Package Dimensions | 10.35 x 7.64 x 4.65 inches |
Listed on Amazon as: LaSalle Bristol 66N4MDVAM Bristol 3" Motorized Termination Vavle
View on Amazon#4 · 3-Inch Hub Fit
4. Valterra E40B-8
- Inlet Connection Size: 3 in
- Outlet Connection Size: 3 in
Best for: Three-inch hub-to-hub replacement.
Why it ranks #4: Its stated 3-inch hub-by-hub connection and 12-volt electric operation make it a specific option when that connection style matches the RV plumbing.
A 3-inch hub-by-hub connection defines this Valterra EZ Valve for RV black-water systems, allowing remote electric operation where that connection configuration is required. The supplied description identifies it as a 12-volt, 2.5-amp electric waste valve, with waste-flow control remaining part of its stated purpose.
The 3-inch inlet and outlet sizes, along with the hub-to-hub description, make connection type and diameter central to deciding whether this valve suits an existing black-water system. Its electric operation provides remote control, avoiding the need to operate the valve directly at the plumbing. The listed 12-volt, 2.5-amp power details help clarify the electrical requirements stated for operation. Buyers should distinguish this hub-to-hub configuration from other 3-inch connection styles.
- 3-inch hub-by-hub connection
- Specified for RV black-water systems
- Electric remote operation
- 12-volt, 2.5-amp power specification
- The specified connection is 3-inch hub by 3-inch hub, limiting plumbing compatibility.
Skip it if you need a valve with a 1.5-inch connection; the Valterra E1013NEVP has 1.5-inch inlet and outlet connections.
Consider this Valterra when an RV black-water system calls for a 3-inch hub-to-hub electric valve and remote operation. Its specified connection configuration is a strict fit boundary, so other 3-inch interfaces may not match.
Full product details
| Brand | Valterra |
|---|---|
| Inlet Connection Size | 3 inches |
| Manufacturer | Valterra |
| Model Number | E40B-8 |
| Outlet Connection Size | 3 inches |
| Size | 3 inches |
| Thread Size | 3 inches |
Listed on Amazon as: Valterra – E40B-8 – E-VALVE 3' HUB X 3' HUB
View on Amazon#5
5. LaSalle Bristol 66NMDVAM
- Weight: 8 lb
Best for: Motorizing kit for existing valves.
Why it ranks #5: This is a motorizing kit rather than a complete valve; it supports existing 3-inch or 1.5-inch termination valves and includes a motor, wire, and switch.
The LaSalle Bristol Motodrain kit motorizes existing 1.5-inch or 3-inch termination valves, making it a flexible route to switch operation for gray- or black-water plumbing. Its compact design suits limited installation space, and a single-pin bypass preserves manual operation if RV electrical power fails.
This kit includes a bracket, hardware, motor, wire, and switch to open and close a termination valve automatically. Its stated compatibility with 1.5-inch and 3-inch valves gives owners of either size a motorizing option without selecting a new valve size from the kit description. Compact construction can help in tight installation areas. The single-pin bypass provides a manual operating method if the RV battery or electrical system fails.
- Works with 1.5-inch or 3-inch termination valves
- Includes motor, wire, switch, bracket, and hardware
- Compact design for limited-space installations
- Single-pin manual bypass
- It is a motorizing kit, so the termination valve itself must be supplied separately.
Skip it if you need a complete 3-inch termination valve assembly; the LaSalle Bristol 66N4MDVAM includes the valve.
Choose this kit when retaining a compatible 1.5- or 3-inch termination valve and adding switch operation. It includes the motor and control components, but buyers need an existing valve or a separate one.
Full product details
| Brand | LaSalle Bristol |
|---|---|
| Item Weight | 8 pounds |
| Item model number | 66NMDVAM |
| Manufacturer | LaSalle Bristol |
| Part Number | 66NMDVAM |
| Model | 66NMDVAM |
| Package Dimensions | 14 x 8 x 8 inches |
Listed on Amazon as: LaSalle Bristol 66NMDVAM Motorizing Kit for 3" or 11/2 Termination Vavles
View on Amazon#6
6. Thetford Electric Valve C200
- Weight: 0.13 kg
- Inlet Connection Size: 25.4 millimeters
- Outlet Connection Size: 25.4 millimeters
Best for: Thetford toilet replacement valve.
Why it ranks #6: This is a replacement electric flush valve for Thetford C250, C260, and C400 toilets, not a tank termination valve for routine RV dumping.
This Thetford electric flush valve is identified as a replacement for C250, C260, and C400 toilets, making its value specific to those toilet models rather than general RV tank termination plumbing. Its 25.4-millimeter inlet and outlet connections further define the replacement fit.
The product description identifies this as a replacement electric flush valve for Thetford C250, C260, and C400 toilets, so it addresses toilet flushing rather than a standard external tank termination-valve installation. Its listed inlet and outlet connection sizes are both 25.4 millimeters, useful dimensions when checking the plumbing interface. The compact listed dimensions of 6.22 x 4.65 x 1.54 inches may help assess space around the toilet, but the model-specific application is the primary fit criterion.
- Replacement electric flush valve for Thetford C250 toilets
- Also specified for C260 and C400 toilets
- 25.4-millimeter inlet connection
- 25.4-millimeter outlet connection
- Its stated application is limited to Thetford C250, C260, and C400 toilet replacement.
Skip it if you need an external tank termination valve; the Valterra E1003NEVP is an electric valve with a 3-inch outlet.
This replacement suits owners servicing a Thetford C250, C260, or C400 toilet who need an electric flush valve. It is a toilet component, not a general-purpose external RV dump-valve assembly.
Full product details
| Brand | Thetford |
|---|---|
| Inlet Connection Size | 25.4 millimeters |
| Item Dimensions | 6.22 x 4.65 x 1.54 inches |
| Item Weight | 0.13 kg |
| Dimensions | 6.22 x 4.65 x 1.54 inches |
| Manufacturer | Thetford |
| Part Number | 23709 |
| Material | Plastic |
| Model Number | 23709 |
| Outlet Connection Size | 25.4 millimeters |
| Size | Standard |
| Thread Size | 12.7 millimeters |
| Additional Information | Important information |
Listed on Amazon as: Thetford ELECTRIC VALVE C200
View on AmazonAvoid confusing a toilet flush valve with a dump valve
The Thetford Electric Valve C200 is a toilet flush-valve replacement, not an RV tank termination valve. Its listed application is replacement in Thetford C250, C260, and C400 toilets, and its connection sizes are 25.4 millimeters at the inlet and outlet. That differs from the Valterra and LaSalle Bristol products described for waste-tank draining or termination-valve operation.
This distinction matters because the word electric valve alone does not establish that a part controls the black- or gray-water tank outlet. Check the part’s stated application and your RV’s existing component before purchasing.
If you are repairing a Thetford toilet, the C200 may be relevant; if you are automating tank discharge, compare the termination-valve products instead. The C200’s listed dimensions and material do not establish compatibility with other toilet models or tank plumbing.
Plan for power loss and manual operation
Power-loss operation differs across the listings, so verify the backup method rather than assuming every electric valve has one. The Valterra E1013NEVP explicitly lists a manual override, while the LaSalle Bristol 66N4MDVAM and 66NMDVAM describe a single-pin bypass for manual operation if the RV battery or electrical system fails. The E1003NEVP listing emphasizes a resettable circuit breaker and a valve-open warning light, but does not specify a manual bypass in the supplied details.
These features solve different problems: a breaker protects the electrical system, an indicator reports valve status, and a bypass permits manual operation. If access to a manual fallback is important, prioritize products that state one and confirm how it engages during installation.
The supplied listings do not explain bypass location, operating steps, or whether the valve can be manually closed in every installation.
How to Choose an RV Electric Dump Valve
Match the connection size and style
Look first for a valve connection that matches the existing termination plumbing, not just a product described as an RV valve. The listings identify 3-inch outlet connections on the Valterra E1003NEVP and 3-inch inlet and outlet connections on the Valterra E40B-8; the Valterra E1013NEVP lists 1.5-inch inlet and outlet connections. The LaSalle Bristol kit is described as supporting 3-inch or 1.5-inch termination valves, while the complete Bristol valve is specified as 3-inch.
The E40B-8 specifically uses a 3-inch hub-by-hub connection, a detail that must match the plumbing style. Choose the 1.5-inch option for a verified 1.5-inch setup; choose a 3-inch product only when both size and connection arrangement are compatible.
Decide between a complete valve and a motorizing kit
Choose a complete motorized valve if you need the termination valve itself, and a motorizing kit only if you have a compatible valve to motorize. The LaSalle Bristol 66N4MDVAM includes a 3-inch Bristol termination valve, bracket, hardware, motor, wire, and switch. By contrast, the LaSalle Bristol 66NMDVAM is described as a kit for existing 3-inch or 1.5-inch termination valves and lists the bracket, hardware, motor, wire, and switch without a replacement valve.
The Valterra E1003NEVP and E1013NEVP are presented as electric valve systems, with the latter explicitly listing pre-wired components. Buyers replacing an entire valve should favor the complete product; buyers retaining a compatible valve may prefer a kit.
Confirm what is included and inspect the existing valve before selecting.
Compare controls and electrical details
Check the listed electrical features and controls against the way you want to operate the valve. The Valterra E1003NEVP and E1013NEVP both list a 2.5-amp draw; the E1003NEVP also lists a 3-year warranty, an open-valve warning light, and pre-wiring. The E1013NEVP describes 12-volt switch operation and lists a manual override and indicator.
The LaSalle Bristol products include a switch and describe a single-pin manual bypass, while the E40B-8 listing states 12-volt, 2.5-amp operation but gives fewer control details. A buyer seeking documented status indication may favor a Valterra model; someone prioritizing a specified manual fallback may favor a LaSalle Bristol product.
Confirm wiring, switch placement, and electrical compatibility for the specific RV installation, since the supplied details do not resolve those vehicle-specific requirements.
Which RV electric dump valve should you choose?
For a verified 3-inch setup and a packaged electric system, choose the Valterra E1003NEVP; it leads with pre-wiring, an open-valve warning light, and a stated 3-year warranty. If your existing plumbing is 1.5 inches, the Valterra E1013NEVP is the more appropriate match and lists a manual override. Choose the LaSalle Bristol 66N4MDVAM when you need a complete 3-inch valve assembly with motor, switch, and manual bypass.
The Valterra E40B-8 suits a specific 3-inch hub-by-hub connection, so verify that style before ordering. If you already have a compatible termination valve and only want to motorize it, consider the LaSalle Bristol 66NMDVAM.
For a Thetford C250, C260, or C400 toilet flush-valve repair, the Thetford Electric Valve C200 fits that separate use case, not tank dumping.
Frequently Asked Questions
How can I confirm whether my RV needs a 1.5-inch or 3-inch dump valve?
Check the size of the existing termination valve and plumbing, then confirm that the replacement matches the connection and mounting arrangement. The 1.5-inch Valterra E1013NEVP is intended for a 1.5-inch setup; the E1003NEVP is a 3-inch option. Verify the existing plumbing before ordering.
Can an electric dump valve be operated manually if the RV battery fails?
Only if the specific valve provides a manual override or bypass; do not assume every electric model does. The Valterra E1013NEVP lists a manual override, and the LaSalle Bristol 66N4MDVAM complete assembly includes a manual bypass. Check the product details and installation before relying on manual operation.
How do I tell whether I need a complete termination valve or only a motorizing kit?
Choose a complete valve assembly if you need the termination valve and electric components together. The LaSalle Bristol 66N4MDVAM is described as a complete 3-inch assembly with motor, switch, and manual bypass. Choose the 66NMDVAM motorizing kit if you already have a compatible termination valve to motorize.
Is the Thetford Electric Valve C200 suitable for dumping an RV holding tank?
No. The Thetford Electric Valve C200 is for a separate toilet flush-valve repair use case, fitting Thetford C250, C260, or C400 toilets. It is not a tank-dumping valve.
For holding-tank plumbing, compare the termination-valve options and verify that the size and connection match your RV.
What should I verify before choosing a hub-by-hub electric valve?
Confirm that your existing plumbing has the specific 3-inch hub-by-hub connection required by the Valterra E40B-Its connection style is not interchangeable by assumption with other 3-inch arrangements. Check the current valve and mounting setup against the product details before ordering to avoid a mismatch.
Final Words
Start by confirming your RV’s valve size, connection style, and mounting arrangement. For a verified 3-inch setup and a packaged electric system, the Valterra E1003NEVP is the overall pick; the 1.5-inch E1013NEVP is the better match for that plumbing size. Choose the LaSalle Bristol assembly for a complete valve with manual bypass, or its kit if you already have a compatible valve.
Treat the Thetford C200 as a toilet repair part, not a tank valve.
